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Welcome to Union County ...

Time Zone: Union County lies in the Mountain Time Zone (MST/MDT) and observes daylight saving time.

The community of Clayton is the Seat for Union County.

Union County was founded in 1893. Union was created by taking area from Colfax, Mora and  Counties.

From the Census Estimates for 2019, <1> Union had a population of 4,059 people. This is a decrease of 10.61% since the last Census (which gave a population of 4,541 people in 2010).

At the time of the 2010 Census, Union represented 0.22% of the total population of New Mexico.

Below are some of the communities located in Union County:

  • Clayton
    (13 miles [20.9 km] to the east)
    • Jump to our Gazetteer entry for Clayton
    • Clayton is located in Union County (NM)
    • Population from the 2020 Census: 2,660 people
    • Jump to TripAdvisor's Tourism page for Clayton <2>
  • Des Moines
    (29 miles [46.7 km] to the northwest)
    • Note: The GPS coordinates that we are using for Des Moines have been provided by the GNIS.<3> The coordinates still need to be verified.
    • Jump to our Gazetteer entry for Des Moines
    • Des Moines is located in Union County (NM)
    • Population from the 2020 Census: 121 people
    • Jump to TripAdvisor's Tourism page for Des Moines <2>
  • Folsom
    (37 miles [59.5 km] to the northwest)
    • Note: The GPS coordinates that we are using for Folsom have been provided by the GNIS.<3> The coordinates still need to be verified.
    • Jump to our Gazetteer entry for Folsom
    • Folsom is located in Union County (NM)
    • Population from the 2020 Census: 53 people
    • Jump to TripAdvisor's Tourism page for Folsom <2>
  • Grenville
    (12 miles [19.3 km] to the northwest)
    • Note: The GPS coordinates that we are using for Grenville have been provided by the GNIS.<3> The coordinates still need to be verified.
    • Jump to our Gazetteer entry for Grenville
    • Grenville is located in Union County (NM)
    • Population from the 2020 Census: 29 people
    • Jump to TripAdvisor's Tourism page for Grenville <2>

Websites of Interest ...

Footnotes ...

<1>On a yearly basis, the US Census Bureau creates an estimate of the county's population. Keep in mind that this is an estimate and not an actual count. The last physical count was the 2010 Census and the next count will be for the 2020 Census.
<2>While we're fans and frequent users of TripAdvisor, you should know that we're also members of the TripAdvisor affiliate program.
<3>The location has been supplied by the Geographic Names Information System - which is maintained by the U.S. Geological Survey (USGS). While these values should be definitive, we found that accuracy can vary and you should double-check the location if accuracy is required.
 

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This page was last modified/updated: 15 Jul 2025